Improvement in addino-machines



G. W. GHAPIN.

Adding Machine. N0.106,999 .Patented Sept. 6, 1870.

titrated swat GILBERT W. OHAPIN, OF BROOKLYN, NEW YORK.

Letters Patent N 0. 106,999, dated September 6, 1870.

IMPROVEMENT IN ADDING-MACHINES.

The Schedule referred to in these Letters Patent and making part of thesame.

To all whom it may concern Be it known that I, GILBERT W. CIIAIIN, ofBrooklyn, in the county of Kings and State of New York, have invented anew and useful Improvement in Adding-Machine; and I do hereby declarethat the following is a full, clear, and exact description thereof,which will enable others skilled in the art to make and use the same,reference being had to the accompan ying drawing forming part of thisspecification.

Figure 1 is a top view of my improved machine.

'Figure 2 is a vertical section of the same, taken through the line a::0, fig. 1.

Figure 3 is a detail side view of one of the spring washers.

Similar letters of reference indicate corresponding parts.

My invention has for its object to furnish an improved :nlding-machine,simple in construction, easily, conveniently, and rapidly operated, andaccurate in operation; and' it consists in the construction andcombination of the various parts of the machine, as hereinafter morefully described.

A is the box, case, or frame of the machine, the upper side of which ismade curved or semicylindricalin form.

I I The forward part of the curved top of the box or case A is cut away,as shown in figs. 1 and 2, said part thus left uncovered being coveredby a slotted plate, 15, as many slots being formed as there are to bewheels in the machine.

0 is a shaft, extending longitudinally through the machine, and thejournals of which revolve in bearings in the end-plates of the box A.

Open the shaft 0, within the box A, are placed two or more wheels, D,the faces of which are scalloped with ten or any convenient multiple often scallops, to enable the wheels to be conveniently turned with thefinger. The scalloped face or part of the face of the wheels D projectthrough the-slots of the plate or casing B, as shown in figs. 1 and 2,for convenience in operating them.

Upon the plain part E of the face, of the wheels D, or upon bandsconnected with the sides of the said wheels D, are placed the numerals O1 2 3 4 5 6 7 8 9, in their regular order, and repeated as many times asthere are ten scallops upon the face of the wheels D.

The slots in the plate B are made of such a length as to allow tenscallops of the wheels D to project through them, and upon the strips ofsaid plate, between the slots, are placed the numerals 0 1 2 3 4 5 6 7 89, a number being opposite each scallop. In the strips of the plate B,opposite the 9 of the series of numerals, is formed a hole, throughwhich the numbers upon the wheels D E may be read. The wheels D E areplaced loosely upon the shaft 0, so that the said wheels may be turnedwithout turning the said shaft.

Upon the shaft 0, at each side of each of the wheels D It, are placedspring washers, 1*, which are secured to the shaft 0 by pins, nuts, orother conven-- ient means, or by making the shaft 0 and theholos throughthe spring washers F square, so that the said washers may always movewith the said shaft. In case the shaft 0 is made square, the wheelsshould be placed and should revolve upon hubs having square holes formedthrough them, to fit upon the said shaft. The spring washers B shouldpress against the sides of the wheels D E with such force that they willcarry the wheels I) E with them when the shaft is turned.

The spring washers 1 I prefer to make convex upon their outer sides,concave upon their-inner sides, and slitted or slotted radially, asshown in figs. 1 and v The wheels D E are kept from carrying the shaft 0with them when they are turned in operating the machine by a springpawl, G, attached to the side of the box A, and which takes hold of theteeth of the ratchet-weeel H, attached to the projecting end of theshaft 0.

The shaft 0 is revolved, when desired, by the knob or handle I, attachedto its projecting end.

J are pawls, pivoted to the sides of the wheels D E, as many of saidpawls being used as there are tens in the number of scallops formed inthe faces of the wheels D, which pawls are held up by springs, K,attached to the side of the said wheels.

L are stationary inclines or pawls, connected with that the pawlsJ ofeach wheel may strike against the said inclines L, and be forced intocontact with the teeth of the small ratchet-wheels M, formed upon theadjacent sides of the contiguous wheels I), just as the Q-inark of thewheel being operated leaves the opening in the strips of the plate B, soas to carry the pext wheel forward one space or number, and thus carrythe tens.

\Vhen the operation is finished, and it is desired to set the machinefor another operation, the shaft O is turned back by means of the knobor handle I. The said shaft, when turned back, carries all the wheels DE with it, until the wheels are stopped, one at a time, by the springpawls J, striking against the shoulder of the stationary inclines orpawls L, so that, by a slight revolution of the shaft 0, the wheels D Eare in an instant all brought into such a position that the zerowheel,H, pawls G J, and spring cam L, all relatively marks of all the wheelswill show through the holes arranged, as and for the purpose described.in the strips of the slotted plate 13. The above specification ofmyinvention signed by Having thus described my invention, me this 13thday of April, 1870.

1 claim as new and desire to secure by Letters GILBERT \V. GHAPIN.Patent- The loose scalloped finger-wheels D E, notched Witnesses: as setforth, and a shaft, 0, having spring washers F GEO. W. MABEE,

fastened to the same, combined with a ratchet- JAMES T. GRAHAM.

